<template>
<el-container>
   
  <el-header>
    <div> 
      <span>后台管理系统</span>
    </div>
    <el-button @click="logout">退出</el-button>
  </el-header>

  <el-container class="home-container">
    <!--侧边栏-->
    <el-aside :width="isCollapse ? '64px' : '200px' ">
      <div class="toggle-button" @click="tpggleCollapse">|||||</div>
      <el-menu
        background-color="#333744"
        text-color="#fff"
        active-text-color="#409Eff"
        unique-opened
        :collapse="isCollapse"
        :collapse-transition="false"
        router
        :default-active="activePath"
        >
           <!--一级菜单-->
      <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
            <!--一级菜单的模板-->
        <template slot="title">
          <i :class="iconObj[item.id]"></i>
          <span>{{item.authName}}</span>
        </template>
       <!--2级菜单-->
        <el-menu-item 
        :index="'/'+subItem.path+''"
         v-for="subItem in item.children" :key="subItem.id"
         @click="saveNavState('/'+subItem.path)"
         >
            <template slot="title">
              <i class="el-icon-menu"></i>
              <span>{{subItem.authName}}</span>
            </template>
    
        </el-menu-item>
      </el-submenu>
    
    </el-menu>
    </el-aside>

    <el-main>
     <router-view></router-view>
    </el-main>

  </el-container>
</el-container>

</template>

<script>
export default {
  data() {
    return {
      menuList:[] ,//左侧数据
      iconObj:{
        '125':'iconfont icon-user',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju', 
        '145':'iconfont icon-baobiao',
      },
      // 是否折叠
      isCollapse:false,
      // 被激活的链接地址
      activePath:''
    }
  },
  created() {
    this.getMenuList()
    this.activePath=window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout(){
      window.sessionStorage.clear()
      this.$router.push('login')
    },
  async getMenuList(){
   const {data:res}= await  this.$http.get('menus')
   if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
   this.menuList=res.data
  //  console.log(res);
    },
  // 点击按钮 ，折叠菜单
    tpggleCollapse(){
       this.isCollapse=!this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath){
     window.sessionStorage.setItem('activePath',activePath)
     this.activePath=activePath
    }
  },
}
</script>

<style lang='less' scoped>
.el-container{  
  height: 100%;
}
.el-header{
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #373d41;
 
}
.el-aside{
  
  background-color: #333744;
  .el-menu{
    border-right: 0
  }
}
.el-main{
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  background-color: #4a5064;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>